/* ========================================
   PAGES - Main page, student page, materials page
   ======================================== */

/* ========== MAIN PAGE TOP BAR ========== */
.main-page-topbar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 14px 28px;
    gap: 8px;
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--bg-primary) 90%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* ========== MAIN PAGE ========== */
.main-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 24px 32px;
    height: calc(100vh - 52px);
    overflow-y: auto;
}

.main-page-header {
    font-family: var(--font-serif-display);
    font-size: 34px;
    font-weight: 400;
    margin-bottom: 20px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.hello-italic {
    font-style: italic;
    opacity: 0.7;
}

/* ========== CAT GIF (Main Page) ========== */
.cat-gif-container {
    margin: 0 0 28px;
    border-radius: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    width: 140px;
    min-height: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.cat-gif {
    width: 140px;
    height: 140px;
    border-radius: 12px;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

/* ========== MAIN PAGE NAV BUTTONS ========== */
.main-nav-buttons {
    display: flex;
    gap: 8px;
    padding: 8px 0 0;
}

.btn-main-nav {
    padding: 9px 20px;
    background: var(--accent-primary);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--accent-primary) 25%, transparent);
}

.btn-main-nav:hover {
    opacity: 0.88;
    transform: translateY(-1px);
}

/* ========== MAIN CONTENT AREA ========== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* ========== CONTENT HEADER ========== */
.content-header {
    padding: 20px 36px;
    padding-top: 52px;
    background: transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.content-title {
    font-family: var(--font-serif-display);
    font-size: 28px;
    font-weight: 400;
    letter-spacing: -0.02em;
    white-space: nowrap;
    color: var(--text-primary);
}

/* ========== STUDENT PAGE SPECIFIC ========== */
.student-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    height: 40dvh;
}

.student-name {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 8px;
}

.student-description-wrapper {
    flex-grow: 1;
}

.student-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 12;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notes-section {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.notes-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.notes-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.header-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    flex: 1;
}

/* ========== TOPICS CONTAINER ========== */
.topics-container,
.materials-container {
    flex: 1;
    overflow-y: auto;
    padding: 0 36px 30px;
}

/* ========== LEGEND ========== */
.legend {
    display: flex;
    gap: 15px;
    padding: 15px 30px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

/* ========== LEVEL FILTER ========== */
.level-filter {
    display: flex;
    gap: 6px;
    background: transparent;
    padding: 0;
    border-radius: 0;
    flex-wrap: wrap;
    min-width: 0;
}

/* ========== MATERIALS PAGE SPECIFIC ========== */
.sidebar-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.filter-group {
    margin-bottom: 24px;
}

.filter-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.selected-tags {
    min-height: 40px;
    padding: 8px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.no-tags {
    color: var(--text-tertiary);
    font-size: 13px;
    font-style: italic;
}

/* ========== MATERIAL VIEW SECTIONS ========== */
.material-view-content {
    margin-top: 20px;
}

.view-section {
    margin-bottom: 24px;
}

.view-section:last-child {
    margin-bottom: 0;
}

.view-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.view-section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.view-section-header .view-section-title {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.view-section-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-primary);
    white-space: pre-wrap;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.material-content-display {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 20px;
    /* white-space: pre-wrap; */
}

/* ========== EMPTY STATES ========== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    text-align: center;
    padding: 80px 20px;
}

.materials-grid .empty-state {
    grid-column: 1 / -1;
}

.topics-grid .empty-state {
    grid-column: 1 / -1;
}

.empty-state-icon {
    margin-bottom: 20px;
    color: var(--text-tertiary);
    opacity: 0.6;
}

.empty-state-text {
    font-family: var(--font-serif-body);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state-hint {
    font-size: 13px;
    color: var(--text-tertiary);
    font-style: italic;
}